Is it possible to consolidate multiple CRM accounts?

Is it possible to consolidate multiple CRM accounts?

We sell our product through a team of international, independent resellers. Several of these resellers are using ZoHo in their sales efforts.

As our business has grown, we've decided to purchase ZoHo CRM Enterprise for all of our resellers and provide accounts for them. We partition their data using the "Groups" function.

Is it possible for me to consolidate their previous accounts and data into our single enterprise account? Or do I just need to export all the data from their accounts and import it into my account? This is slightly complicated because they have already used their corporate email addresses for their previous accounts but I understand how we can work around this.